Effects of Ca3Co4O9 addition on physical and electrical properties of lead-free Bi0.5(Na0.80K0.20)0.5TiO3-0.005LiNbO3 ceramic. Issue 1 (10th December 2022)

• Record Type: Journal Article
• Authors: Wannasut, Pimpilai; Jaita, Pharatree; Promsawat, Methee; Khamman, Orawan; Watcharapasorn, Anucha
• Is Part Of: Ferroelectrics. Volume 601:Issue 1(2022)
• Page Start: 133
• Page End: 140
• Publication Date: 2022-12-10
• Subjects: Calcium cobalt oxide -- lead free piezoelectric ceramics -- bismuth sodium potassium titanate; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2022.2130768
• Languages: English
• ISSNs: 0015-0193

Abstract

Abstract: In the present work, highly dense complex perovskite oxide ceramics with the formula of (1- x )[Bi0.5 (Na0.80 K0.20 )0.5 TiO3 -0.005LiNbO3 ]- x (Ca3 Co4 O9 ) or (1- x )[BNKT-0.005LN]- x CCO, where x = 0, 0.010, 0.015, 0.020 and 0.025 mol fraction were fabricated by a solid-state mixed oxide method. After sintering at 1125 °C for 2 h, all ceramics were characterized in terms of physical, phase evolution, microstructure, dielectric, ferroelectric, and piezoelectric properties. XRD patterns of all samples indicated single phase of perovskite structure with good relative density value of ∼ 97 − 98%. The SEM image indicated that cubic-like shaped grains were observed in all samples. The average grain size was found to increase with increasing the modifier content. Optimum electrical properties (i.e. εr = 1485, tanδ = 0.0460, Pr = 13.13 µC/cm 2, Ec = 14.92 kV/cm and d33 = 145 pC/N) were found in the sample with x = 0.010 mol fraction.